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Material properties

Polyurethane Elastomers Thermoplastics

ECOPUR DD SKF Econbr SKF Ecofkm SKF Ecoptfe SKF Ecotal

Properties Standard Unit

TPU NBR FPM, FKM PTFE POM

n n n n n n n n n n
Standard colour Dark blue Black Black Dark grey Black
Durometer Hardness 1) DIN ISO 7619 Shore A 93 85 85
Durometer Hardness 1) DIN ISO 7619 Shore D 45 58 2) 82 2)

Density DIN EN ISO 1183-1 g/cm 3 1,18 1,32 1,84 2,22 1,41
Tensile strength/yield stress DIN 53504 MPa 50 18 11 19 3) 65 4)
Elongation at yield ISO 527-1/2 % 8-10
Elongation at break DIN 53504 % 520 160 190 250 3) 25 4)
Tensile modulus ISO 527-1/2 MPa 2 900
100% modulus DIN 53504 MPa 12,7 13 7
Compression set
70 °C / 24 h 20% compression DIN ISO 815 % 26
100 °C / 24 h 20% compression DIN ISO 815 % 30 13
100 °C / 24 h DIN ISO 815 %
175 °C /24 h DIN ISO 815 % 17
Impact resistance, charpy
at +23 °C ISO 197-1 kJ/m 2 10
at -30 °C ISO 197-1 kJ/m 2 8
Water absorption, 23 °C, saturation ISO 62 % 0,65
Coefficient of sliding 0,25-0,32
Tear strength DIN ISO 34-1 N/mm 85 19 20

Minimum service temperature 5) °C -30 -30 -20 -200 -50
Maximum service temperature 5) °C +100 +100 +200 +260 +100

1) testing time is 3 s
2) ISO 868
3) ASTM D-4745
4) ISO 527-1/2
5) Minimum and maximum service temperatures are material properties only . Deviations due to varying application parameters are mentioned/stated at each seal profile at the following pages .

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